Increase performance with a generated function

[LilithHafner]

In the case where the type is available at macro expansion time, it should be possible to provide a high performance macro that does introspection at macro expansion time and only trivial operations at runtime.

[aplavin]

Hmm, not sure how to do it as a macro... A generated function definitely seems possible though.

[LilithHafner]

Ah, right. A generated function is the right answer here. A macro would be at macro-expansion time instead of compile time, but that is less flexible.

To do it as a macro the type would need to be a literal type and then the macro would determine what that literal refers to, but that would be a hacky and bad solution in comparison to a generated function.